3215082728 has 64 divisors (see below), whose sum is σ = 7121761920. Its totient is φ = 1341446400.

The previous prime is 3215082713. The next prime is 3215082737. The reversal of 3215082728 is 8272805123.

3215082728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3215082691 and 3215082700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199301 + ... + 214827.

It is an arithmetic number, because the mean of its divisors is an integer number (111277530).

Almost surely, 2^3215082728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3215082728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3560880960).

3215082728 is an abundant number, since it is smaller than the sum of its proper divisors (3906679192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3215082728 is a wasteful number, since it uses less digits than its factorization.

3215082728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15738 (or 15734 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 3215082728 is about 56701.6995159757. The cubic root of 3215082728 is about 1475.9241900140.

The spelling of 3215082728 in words is "three billion, two hundred fifteen million, eighty-two thousand, seven hundred twenty-eight".